FannieAPI is similar to AutoLoader on the lane. It exposes everyting
in the classlib2.0 directory as needed so other code can just
use API classes without worrying about lots of include() statements.
I switched over the install pages as an initial test of functionality.

FannieAuth exposes some parts of user authentication via the class API.
Relying on globals to include $FANNIE_ROOT/auth/login.php when required
is a pain because it's not always obvious where global scope is across
various files. The class, on the otherhand, is always defined and
available.